Carleton University professor Philippe Lagasse wrote in 2017 that according to the federal government's interpretation of royal succession in Canada, the North American country could arguably make Harry the King of Canada with a "simple parliamentary statute".

The theory is essentially based on the idea that the country's executive authority is "vested in the Queen". However it doesn't specify who the Queen must be and doesn't say anything about the monarch being a descendant of Queen Victoria.

To add to this it doesn't even say that the monarch of Canada has to be the same person as the monarch of the U.K.

Conceivably this means Harry could be on Canadian coins within the space of a month.

This is of course highly unlikely unless something seriously dramatic happens to William.